![]() ![]() Have a look at the list of boolean evaluations in the PHP docs. ![]() Notice: Undefined variable: action in C:\in here you are going to have file path\form.php on line 1 . Like else, it extends an if statement to. before doing any thing run your file in the browser and check the source code, and see the value in the form action, it will be some thing like this. It can be a boolean TRUE, or a non-empty, non-NULL value, or non-zero number. elseif, as its name suggests, is a combination of if and else. If not, the second will execute since the condition is false. The construct if (variable) tests to see if variable evaluates to any 'truthy' value. It fetches the value of GETname, if it does not exist or NULL, it returns. If the condition is true then the first part of the code will execute. To uderstand this in a better way consider the following line of code. The condition here simply translates to “If user is equal to Asim and password is equal to 12345″. Before going to user selection based execution of a block in the if.else statement, in this example, I will simply use a static value to show how it works, to. ![]() It will not be readable in your code, and there are much better solutions available. The if statement allows you to execute a statement if an expression evaluates to true. This is because it doesn't generate errors and even though you turn them off - PHP still generates them empty() however won't return errors if the variable doesn't exist. Summary: in this tutorial, you’ll learn about the PHP if statement and how to use it to execute a code block conditionally. Example – Comparing two strings & (And) 0perator A Ternary is not a good solution for what you want. Its worth noting - and I only found this out after nearly 9 years of PHP coding that the best way of checking any variable exists is using the empty() function. The If Else Statement allows a variety of operators which we can use for various functions for example, we may want to compare two strings or see if an integer is greater than or less than a certain number. If the variable name equals Asim then it will execute “Welcome”, otherwise it will execute “Unknown User” since the condition is false. ![]()
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